Also known as the "Freshman Fifteen," this refers to weight (typically 10-15 lbs 5-7kg) that first-year college undergrads often gain. The process is multifactorial, but contributing factors include:

1) Greasy dorm cafeteria food.
2) The readily available pizza and fast food in most college towns.
3) Being forced to eat 3 large meals a day, rather than being free to graze.
4) The fact that many Freshmen who did participate in sports in high school do not continue with their athletics in college.
5) Increased alcohol consumption (alcohol has 100-200 calories per drink, more for sugary liqeurs like Irish Creme).

Incoming Freshmen who are concerned about the Freshman twenty should talk to a doctor or nutritionist to learn about helpful tips for avoiding weight gain.

Also known as "freshman fifteen," freshman twenty refers to the weight freshmen supposedly gain in their first semester of college. It often applies to girls and is not always a negative (i.e. a guy may think a girl looks better afterwards).

Did you see Marie? She really freshman twentied. But she carries the weight well, though; it looks like tons of fun.

Jenny is not as good at cheerleading because she put on the freshman twenty and lost some flexibility, but I would not mind testing it out. Look at her body jiggle in that swimsuit...